Neostempellina thienemanni

Author: Reiss, 1984

Diagnosis (Material in coll. ZSM)
Exuviae 2.7-3.0mm long (n=5) (129-1.jpg).
Cephalothorax: Cephalic tubercles a small tubercle; frontal setae 25-40µm long (n=3). Antennal sheath bases with a minute tubercle. Thoracic horn 125-165µm long; ThR 3.3-4.1 (n=3; horn very thin walled and crumples easily). Thoracic horn with long setae, 115-125µm long, forming a broad fringe from near base to tip (129b.jpg).
Abdomen: Armament of tergite II as extensive as on tergite III, extending beyond seta D1 anteriorly (129c.jpg). Tergites III-VI with a median and posterior patch of points on each side of the mid-line, which may be sufficiently extensive to form a single large continuous patch. Pedes spurii B absent. Pleura posteriorly on segment II with a small patch of minute spinules. Postero-lateral corners of segment VIII with a large toothed spur. Lateral taeniae of segments V-VIII: 3,3,4,3.
Anal segment: Anal lobe ratio 1.5, 1.7 (n=2). Fringe of anal lobe with 14-17 taeniae (n=5) (129d.jpg).

Species keys out at Page 369: Tanytarsini 12 Neostempellina of the Text Key.

C+SE Europe.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Sinter chalk springs and creeks; central and southeastern Europe.